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The risk of pediatric multiple sclerosis was slightly greater among overweight and moderately obese teen girls than their normal-weight peers, according to a study in the journal Neurology. Extremely obese girls were three to four times more likely to develop the condition. The link between childhood obesity and MS was not found in boys, researchers said.

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A study from Denmark and Sweden found no link between the human papillomavirus vaccine and the risk for multiple sclerosis or other demyelinating disease. The study, published in the Journal of the American Medical Association, included about 4 million participants, nearly 800,000 of whom were vaccinated.

Obese teens had a nearly twofold higher risk of developing low-frequency sensorineural hearing loss than their normal-weight peers, according to an analysis published in the journal The Laryngoscope. Researchers looked at the data from the National Health and Nutrition Examination Survey involving 1,500 12- to 19-year-olds, and found that 15.16% of obese teens reported experiencing sensorineural hearing loss compared with 7.89% of those who were not obese.

Cuban researchers looked at 310 babies who received either a fractional dose or full dose of inactivated poliovirus vaccine and found that the administration of a single fractional dose of IPV induced priming immune responses in most babies. They also found cumulative two-dose seroconversion in more than 90% of infants in both groups. The findings were published in the New England Journal of Medicine.

Overweight and obese children were more likely to suffer idiopathic intracranial hypertension than normal-weight peers, according to a study in the Journal of Pediatrics. Of the 78 patients with IIH, researchers noted that 73% were overweight or obese, 85% were girls aged 11 to 19 and almost half were white.

Obese children were three times as likely to snore compared with their normal-weight peers, Italian researchers reported. The study showed obese children also were almost twice as likely to have obstructive sleep apnea as overweight or normal-weight children.